massive slowpoke i bet, but in 7 empires(this might even work for 8 too) i found out that if you use the flute's weapon switch next to the guy it stuns them in place until they get hit by something that makes them flinch(in 7 the 5th level flute has a thunder element on it so i think this might be what causes it) then you switch to throwing knifes and keep spamming the basic attack string and they will be stuck in this spinning loop where they can't attack or defend, but also won't go be knocked away or down.